CN217809203U - Carbide slag roasting treatment system - Google Patents

Abstract

The utility model relates to a carbide slag roasting treatment system, which is characterized in that the system comprises a raw material bin, a suspension roasting furnace, a first cyclone separator and an impurity removal device, wherein the suspension roasting furnace is configured to roast the carbide slag in the raw material bin; the first cyclone separator is communicated with the outlet of the suspension roasting furnace for gas-solid separation; the solid phase separated by the first cyclone is configured to be subjected to impurity removal in an impurity removal device. The calcined finished product is subjected to powder selection and impurity removal, and as the material is decomposed, the impurity removal and powder selection load is reduced, so that the investment and the operating cost are saved, and meanwhile, the problem of agglomeration and caking of the material during impurity removal before calcination is avoided, so that more qualified materials are removed along with the impurities, and the yield of qualified products is reduced.

Description

Carbide slag roasting treatment system

Technical Field

The disclosure relates to the technical field of chemical building material production, in particular to a carbide slag roasting treatment system.

Background

In recent years, with the continuous upgrading of production technology, a large amount of carbide slag is generated in the production process of carbide, the main component of the carbide slag is calcium oxide, and substances such as magnesium, aluminum, iron, silicon and the like may be contained, so that the carbide slag belongs to recyclable substances.

In the multiple approach to carbide slag recycle, just including utilizing the calcination of carbide slag to prepare chemical products, in prior art, adopt the edulcoration technology before the stoving calcination, the easy lump of carbide slag raw materials, and the raw materials volume is far greater than the finished product volume, and the edulcoration effect is poor, and a large amount of raw materials are discharged along with impurity, cause the raw materials extravagant.

SUMMERY OF THE UTILITY MODEL

The present disclosure provides a system for roasting and treating carbide slag, which comprises:

a raw material bin;

a suspension roasting furnace configured to roast carbide slag in a raw material bin;

a first cyclone separator configured to communicate with an outlet of the suspension roaster for gas-solid separation;

and the impurity removing device is used for removing impurities from the solid phase separated by the first cyclone separator.

In one embodiment of the disclosure, the impurity removal device is a winnowing machine configured to screen the solid phase by winnowing, the screened product configured to be sent to a product bin for storage.

In one embodiment of the disclosure, the air separator further comprises a bag-type dust remover, and the finished product screened by the air separator is configured to be collected in the bag-type dust remover and then sent to a finished product bin for storage.

In one embodiment of the present disclosure, further comprising:

a conveyor belt located below the bag-type dust collector and configured to convey a finished product falling from the bag-type dust collector;

and the bucket elevator is matched with the finished products conveyed by the conveying belt and is used for conveying the finished products into the finished product bin for storage.

In one embodiment of the disclosure, the exhaust fan is communicated with the bag-type dust remover and is configured to send the smoke of the bag-type dust remover to a chimney for exhaust.

In one embodiment of the disclosure, the device further comprises a cooling system, and the solid phase separated by the first cyclone separator enters the impurity removing device after being cooled by the cooling system.

In one embodiment of the disclosure, the cooling system comprises at least one stage of cyclone cooler, and the solid phase from the first cyclone separator enters the at least one stage of cyclone cooler for cooling.

In one embodiment of the disclosure, the external gas stream is preheated after passing through at least one stage of cyclone cooler in reverse order, and the preheated gas stream is configured to be fed into the suspension calciner as combustion air.

In one embodiment of the present disclosure, the cyclone cooler includes a first cyclone cooler, a second cyclone cooler, and a third cyclone cooler which are sequentially communicated; and the solid phase is sequentially cooled step by the first cyclone cooler, the second cyclone cooler and the third cyclone cooler.

In one embodiment of the disclosure, the external air flow passes through the third cyclone cooler, the second cyclone cooler and the first cyclone cooler in reverse order and then is preheated by solid phase stage by stage, and the preheated air flow is configured to be sent into the suspension roasting furnace as combustion air.

Compared with the method for removing impurities from carbide slag before roasting, the method has the advantages that the impurity removing system is arranged behind the roasting system, the solid material amount after the roasting is far smaller than the raw material amount, impurity removing load is reduced, meanwhile, the material is looser, impurity removing effect is improved, waste of finished products is less, and yield of the finished products is improved.

Other features of the present disclosure and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the disclosure and together with the description, serve to explain the principles of the disclosure.

Fig. 1 is a schematic structural diagram of a suspension roaster according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of a crushing device provided by an embodiment of the disclosure;

FIG. 3 is a schematic structural diagram of a second cyclone separator provided by an embodiment of the disclosure;

FIG. 4 is a schematic structural diagram of a cooling system provided by an embodiment of the present disclosure;

FIG. 5 is a schematic structural diagram of an impurity removing device according to an embodiment of the present disclosure;

fig. 6 is a schematic structural diagram of a carbide slag roasting treatment system according to an embodiment of the present disclosure.

The one-to-one correspondence between component names and reference numbers of fig. 1-6 is as follows:

1-raw material bin, 2-suspension roasting furnace, 211-burner, 212-first air inlet, 221-second air inlet, 23-first feed inlet, 24-outlet of suspension roasting furnace, 25-second feed inlet, 3-first cyclone separator, 4-crushing device, 5-reheating furnace, 6-cyclone preheater, 7-second cyclone separator, 81-first cyclone cooler, 82-second cyclone cooler, 83-third cyclone cooler, 9-impurity removal device, 101-bag dust collector, 102-exhaust fan, 103-chimney, 104-conveyor belt, 105-bucket elevator, and 106-finished product bin.

Detailed Description

Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of parts and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present disclosure unless specifically stated otherwise.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the disclosure, its application, or uses.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

Specific embodiments of the present disclosure are described below with reference to the accompanying drawings.

In this document, "upper", "lower", "front", "rear", "left", "right", and the like are used only to indicate relative positional relationships between relevant portions, and do not limit absolute positions of the relevant portions.

In this document, "first", "second", and the like are used only for distinguishing one from another, and do not indicate the degree and order of importance, the premise that each other exists, and the like.

In this context, "equal", "same", etc. are not strictly mathematical and/or geometric limitations, but also include tolerances as would be understood by a person skilled in the art and allowed for manufacturing or use, etc.

The utility model provides a carbide slag roasting processing system includes raw materials storehouse, suspension roaster, first cyclone and edulcoration device, and the suspension roaster is configured to roast the carbide in the raw materials storehouse, and first cyclone communicates with the export of suspension roaster to gas-solid separation is carried out to the gas-solid mixture of suspension roaster exhaust. The solid phase separated by the first cyclone is configured to be purified in a purification apparatus.

Therefore, the system disclosed carries out powder selection and impurity removal on the calcined finished product, reduces impurity removal and powder selection loads due to the fact that the material is decomposed, saves investment and operation cost, and meanwhile avoids the problem that more qualified materials are removed along with impurities due to the fact that the materials are agglomerated and caked before calcination in impurity removal, and the yield of the qualified products is reduced.

For easy understanding, specific structures and operation principles of the present disclosure are described in detail below with reference to fig. 1 to 6.

Referring to fig. 1 and 2, in one embodiment of the present disclosure, a system of the present disclosure includes a drying system, a preheating system, a roasting system, a cooling system, a cleaning system, and the like of raw materials. The system of the present disclosure includes a raw material bin 1, a suspension roasting furnace 2, a first cyclone 3.

The raw material bin 1 may be used for storing carbide slag, and the specific structure of the raw material bin may be a small, medium or large warehouse structure common in the art, or a warehouse cluster formed by a plurality of warehouses, and according to specific production requirements, the raw material bin 1 may be used for storing other raw materials besides carbide slag, which is not limited to this.

The suspension roasting furnace 2 includes a hearth as a main region for roasting the carbide slag, and the hearth may be divided into a main combustion zone 21 and a burnout zone 22 according to an extending direction of the hearth, and the burnout zone 22 is located above the main combustion zone 21. The main combustion zone 21 is configured to perform oxygen-deficient roasting on the carbide slag from the raw material bin 1, where the oxygen-deficient roasting is understood to mean that the fuel introduced into the main combustion zone 21 generates heat to roast the carbide slag under the condition of oxygen-deficient combustion, and the oxygen-deficient combustion refers to that combustion-supporting air is insufficient to completely burn the fuel so as to reduce nitrogen oxides generated by combination of nitrogen and oxygen under a high-temperature environment, and simultaneously generate a large amount of reducing substances containing HCN, OH, CH and the like in an oxygen-deficient environment, so that the nitrogen oxides can be further reduced, and the nitrogen oxides can be further reduced.

The burnout zone 22 is configured to burn the calcined carbide slag in the primary combustion zone 21, which is understood to mean that the fuel that is not burned in the primary combustion zone 21 is completely burned in the burnout zone 22, and the heat is further increased in the process, so that the calcined carbide slag in the primary combustion zone 21 is further calcined to obtain the final product. In one embodiment of the disclosure, the carbide slag is calcined to calcium oxide after passing through the primary combustion zone and the burnout zone.

It should be noted that, in the present disclosure, most of the fuel is completely combusted by the oxygen-deficient combustion in the main combustion zone 21, the reducing substance generated in the process can reduce the nitrogen oxides generated in the roasting process, a small amount of fuel remains in the burnout zone 22, and only a small amount of combustion air is needed to completely combust the fuel.

With continued reference to fig. 1, the main combustion zone 21 of the furnace includes a burner 211 extending into the main combustion zone, and a first air inlet 212, wherein the burner 211 can introduce fuel, such as gas, pulverized coal, and the like, into the main combustion zone 21, and can provide heat, the burner 211 can also ignite the fuel introduced into the main combustion zone 21 in a state of containing combustion air, the first air inlet 212 is configured to introduce combustion air into the main combustion zone to provide a combustion environment for the fuel, the first air inlet 212 can also have an adjusting function to adjust the amount of the combustion air introduced into the main combustion zone 21, and in the present disclosure, the first air inlet 211 is configured to introduce insufficient combustion air into the main combustion zone 21, so that the fuel introduced into the main combustion zone 21 is subjected to oxygen deficiency combustion.

With continued reference to fig. 1, the hearth further includes a first feed inlet 23 communicated with an external material pipe, the external material pipe is used for conveying the carbide slag from the raw material bin or is used as a pretreatment device for connecting the carbide slag, and in order to better roast the carbide slag, corresponding pretreatment can be performed before roasting the carbide slag, for example, the carbide slag raw material is scattered, dried, preheated, etc., so as to improve the roasting effect of the carbide slag and facilitate the preparation of products. The first feeding hole 23 is located at a corresponding position of the main combustion area 21, for example, the first feeding hole may be located above the burner 211 in the main combustion area 21, so that the carbide slag entering the main combustion area 21 through the first feeding hole 23 falls above the flame emitted by the burner 211 and is carried by the flue gas to move toward the burnout area 22.

With reference to fig. 1, after the carbide slag is roasted in the main combustion area 21, the carbide slag enters the burnout area 22, the burnout area 22 is located at a predetermined height from the burner, a second air inlet 221 is formed in the side wall of the burnout area 22, and the second air inlet 221 is configured to introduce combustion air, so that the fuel entering the burnout area 22 from the main combustion area 21 is completely combusted, the heat is further improved by the complete combustion of the fuel, and the roasting effect of the carbide slag is ensured.

In the above process, referring to fig. 1, the flue gas generated by the combustion in the main combustion zone 21 is sprayed upwards, so that the flue gas drives the carbide slag entering the main combustion zone 21 through the first feeding hole 23 to move upwards; the burnout zone 22 is further supplied with combustion-supporting air, and when the carbide slag roasted in the main combustion zone 21 is roasted, the generated flue gas further drives the solid phase generated after roasting to move upwards, and finally the solid phase generated by roasting is discharged along with the flue gas through an outlet 24 of the suspension roasting furnace 2.

With reference to fig. 1, the first cyclone separator 3 is communicated with the outlet of the suspension roasting furnace 2, the solid phase generated by roasting the suspension roasting furnace 2 and the flue gas enter the first cyclone separator 3 together, and the first cyclone separator 3 performs gas-solid separation to separate the solid phase, so that the next treatment is facilitated.

The separated solid phase is configured to be sent into the suspension roasting furnace 2 in a ratio-adjustable manner for repeated roasting and sent into a cooling system for cooling so as to form active calcium oxide or form overfire calcium oxide according to actual production requirements.

In detail, referring to fig. 1, a second feed port 25 is further opened on the side wall of the suspension roasting furnace 2, and the solid phase outlet end of the first cyclone 3 has two pipes, one of which is communicated with the second feed port 25 to feed the separated solid phase into the suspension roasting furnace 2 for repeated roasting, and the other is communicated with a cooling system to feed the separated solid phase into the cooling system for cooling. The proportion of the solid phase which enters the suspension roaster 2 for repeated roasting and enters the cooling system for cooling can be adjusted by an adjusting device. The adjusting device may be, for example, an adjusting valve, and the adjusting valve may be configured to feed a portion of the separated solid phase into the suspension roaster 2 to be repeatedly roasted, and to feed a portion of the solid phase into a cooling system to be cooled, thereby obtaining an overfire product, i.e., overfire calcium oxide.

The proportion of the materials entering the suspension roasting furnace 2 can be controlled by the regulating valve, so that the aim of regulating the circulation rate of the materials is fulfilled. By adjusting the appropriate material circulation rate, the carbide slag roasting system disclosed by the invention can be controlled to prepare the calcined calcium oxide.

In another embodiment of the present disclosure, the solid phase separated by the first cyclone 3 may not be sent to the suspension roasting furnace 2 for overburning, but all may be sent to a cooling system for cooling. When the carbide slag needs to be roasted to generate active lime, the mixed material coming out of the suspension roasting furnace 2 is separated by the first cyclone separator 3 and then is completely sent into a cooling system for cooling, and the finished product is the active lime. When the calcium carbide slag needs to be roasted to generate the burnt lime, the mixed material coming out of the suspension roasting furnace 2 is separated by the first cyclone separator 3, part of the mixed material is sent into the suspension roasting furnace 2 for repeated roasting, the circulation frequency can be determined according to specific parameters as long as the burnt lime can be generated, and the burnt lime separated from the first cyclone separator 3 enters a cooling system for cooling.

According to the system disclosed by the invention, on the premise of not increasing the length of the furnace body, the suspension roasting furnace 2 can be used for preparing active lime or over-burnt lime, so that the diversity of roasted products is improved.

In the actual production process, in order to ensure the production quality, before roasting the carbide slag, the carbide slag needs to be correspondingly treated, and referring to fig. 2, in one embodiment of the present disclosure, a crushing device 4 and an auxiliary heating furnace 5 are further included between the raw material bin 1 and the suspension roasting furnace 2. The crushing device 4 is connected with the raw material bin 1 and is configured to crush the carbide slag from the raw material bin 1; the holding furnace 5 is connected to the crushing device 4, the holding furnace 5 being configured to supply heat to the crushing device 4 in a power-adjustable manner for drying the crushed carbide slag in the crushing device 4. Thus, the suspension roasting furnace 2 is configured to roast the crushed carbide slag, and the flue gas generated by roasting is introduced into the crushing device 4 to dry the carbide slag in the crushing device 4.

Under the configuration, when the water content of the carbide slag changes, the fuel and the air quantity of the suspension roasting furnace 2 can be adjusted without adjusting, and only the concurrent heating furnace is adjusted, so that the working condition of the roasting furnace can be kept stable, and the production stability and the product quality are improved.

In detail, with reference to fig. 2, the crushing device 4 may be connected to the raw material silo 1 by means of a conveying device, which may also have a metering function for metering the carbide slag into the crushing device 4, for example a metering belt. The carbide slag in the raw material bin 1 can be conveyed into the crushing device 4 through conveying equipment, so that the carbide slag can be transferred from the raw material bin 1 to the crushing device 4 in various ways without limitation.

The crushing device 4 has the function of crushing the carbide slag into small powder particles from the bonding material block, and can convert the carbide slag into the small powder particles from the bonding material block in the forms of beating, rolling and the like so as to conveniently roast the carbide slag; breaker 4 still possesses drying function simultaneously, and breaker 4 can leading-in outside hot flue gas with carbide slag crushing process, carries out drying and heating to the carbide slag to this effect that reaches stoving and preheat makes things convenient for follow-up to handle the carbide slag. For example, the crushing device 4 may be a drying crusher, and may crush the carbide slag and dry the crushed carbide slag.

In one embodiment of the disclosure, the source of the external hot air or hot flue gas of the crushing device 4 may be co-fed by the holding furnace 5 and the suspension roasting furnace 2. The hot air furnace 5 can be a hot air furnace, hot air can be generated by combustion, and hot air blown by the hot air furnace can be converged with flue gas generated by roasting the suspension roasting furnace 2 and then introduced into the crushing device 4 so as to dry the crushed carbide slag in the crushing device 4.

In detail, referring to fig. 2, the gas pipe from the holding furnace 5 and the gas pipe from the suspension roasting furnace 2 are merged and jointly introduced into the gas inlet pipe of the crushing device 4, thereby jointly drying the crushed carbide slag in the crushing device 4.

For the drying of the carbide slag, the drying is related to the humidity of the carbide slag, and as the skilled person knows, the smaller the humidity of the carbide slag, the less heat is needed; the greater the moisture of the carbide slag, the more heat is.

For this reason, in one embodiment of the present disclosure, in the case where the humidity of the carbide slag is less than the threshold value, the carbide slag may be dried only by the flue gas generated after the roasting of the suspension roasting furnace 2. That is, when the moisture of the carbide slag is too small, the drying may be performed only by the flue gas generated after the roasting in the suspension roasting furnace 2 without turning on the holding furnace 5.

In another embodiment of the present disclosure, when the humidity of the carbide slag is greater than the threshold, the flue gas generated after the roasting in the suspension roasting furnace 2 and the holding furnace 5 are used for drying, and when the humidity is greater than the threshold, the crushed carbide slag cannot be completely dried only by the flue gas from the suspension roasting furnace 2, so that the crushed carbide slag needs to be dried together with the hot air in the holding furnace 5.

In the system disclosed by the invention, when the humidity of the carbide slag in the crushing device 4 is relatively high, the carbide slag can be dried together by the flue gas in the suspension roasting furnace 2 and the concurrent heating furnace 5. In addition, the power of the holding furnace 5 is adjustable, so that under the condition that the introduction amount of the flue gas of the suspension roasting furnace 2 to the crushing device 4 is not changed, the requirement of treating the carbide slag with different humidity can be met only by adjusting the power of the holding furnace 5, and the stability of the fuel and air amount required by the suspension roasting furnace 2 is further maintained.

Referring to fig. 2, in an embodiment of the present disclosure, flue gas from the suspension roasting furnace 2 is specifically provided by a first cyclone 3, the first cyclone 3 is communicated with an outlet of the suspension roasting furnace 2, the suspension roasting furnace 2 discharges a roasted solid phase and flue gas into the first cyclone 3 together, after gas-solid separation is performed by the first cyclone 2, the separated flue gas has a high temperature and is discharged from a gas outlet above the first cyclone 2, and the gas outlet of the first cyclone 3 is communicated with a gas inlet pipeline of the crushing device 4 through a gas pipeline, so that the flue gas discharged from the first cyclone 3 enters the crushing device 4 to dry carbide slag in the crushing device 4.

In an embodiment of the present disclosure, referring to fig. 2, the present disclosure further includes a preheating system, the preheating system includes a cyclone preheater 6, the carbide slag crushed by the crushing device 4 is configured to enter the suspension roasting furnace 2 for roasting after being preheated by the cyclone preheater 6, and the crushed carbide slag needs to be preheated before being roasted by the suspension roasting furnace 2.

In detail, the cyclone preheater 6 may transfer heat from an external heat source to the crushed carbide slag entering the cyclone preheater 6, thereby achieving the purpose of preheating the crushed carbide slag.

In one embodiment of the present disclosure, referring to fig. 2, the gas outlet of the first cyclone 3 is communicated with the gas inlet of the cyclone preheater 6 through a gas pipe, and the flue gas separated from the first cyclone 3 is configured to pass through the cyclone preheater 6 to preheat the carbide slag located in the cyclone preheater 6.

In an embodiment of the present disclosure, referring to fig. 2, the gas outlet of the cyclone preheater 6 is communicated with the gas inlet channel of the crushing device 4 through a gas channel, and the temperature of the flue gas from the cyclone preheater 6 can be reduced to be suitable for drying the carbide slag in the crushing device 4 after preheating the carbide slag. I.e. the flue gas coming out of the cyclone preheater 6 is arranged to enter the crushing device 4 for drying the carbide slag in the crushing device 4. Similarly, the carbide slag is dried in the crushing device 4 and then preheated in the cyclone preheater 6 to raise the preheating temperature of the carbide slag until it meets the temperature of the carbide slag in the suspension roaster 6.

The cyclone preheater 6 may comprise at least one, or at least two, to gradually preheat the carbide slag before entering the suspension roaster 6 until reaching the standard of entering the suspension roaster 6. Likewise, the flue gas separated in the first cyclone 3 may be subjected to a gradual temperature reduction by the cyclone preheaters 6 until reaching the standard of entering the crushing device 4, and the number of the cyclone preheaters 6 is not particularly limited in this disclosure.

In the two embodiments, referring to fig. 2, the flue gas enters the cyclone separator 6 and the crushing device 4 in sequence from the first cyclone separator 3, and is used for preheating the carbide slag in the cyclone separator 6 and drying the carbide slag crushed in the crushing device 4, the flue gas is high-temperature flue gas generated after roasting in the suspension roaster 2, and the external heat of the cyclone preheater 6 is completely provided by the high-temperature flue gas.

In one embodiment of the present disclosure, the second cyclone separator 7 is further included, the second cyclone separator 7 is connected between the crushing device 4 and the cyclone preheater 6, the crushed carbide slag and the flue gas in the crushing device 4 are sent to the second cyclone separator 7 in a form of a gas-solid mixture, the second cyclone separator 7 performs gas-solid separation on the gas-solid mixture, the separated solid phase is sent to the cyclone preheater 6 for preheating, and the separated flue gas is configured to be discharged from the gas outlet of the second cyclone separator 7 to the bag-type dust collector 8 for collection.

The bag-type dust collector is provided with an air inlet, a filter element and an air outlet, after the flue gas is introduced into the bag-type dust collector, suspended impurities in the flue gas can be filtered and collected through the filter element, and the filtered flue gas can be discharged through the air outlet of the bag-type dust collector.

In detail, most of the separated solid phase is broken carbide slag, and the broken carbide slag in the gas-solid mixture can be separated by the second cyclone separator 7; solid impurities in the separated flue gas are collected through the bag-type dust collector, so that direct discharge can be avoided, and the environment is polluted.

In one embodiment of the present disclosure, referring to fig. 3, the second cyclone separator 7 is in communication with a bag-type dust collector 101, and further comprises an exhaust fan 102 in communication with the bag-type dust collector, wherein the exhaust fan 102 is configured to send the flue gas in the bag-type dust collector 101 to a chimney 103 for exhaust.

In detail, the air inlet of the exhaust fan 102 is connected with the air outlet of the bag-type dust collector 101, and the exhaust fan 102 provides negative pressure to the air outlet of the bag-type dust collector 101 through the air inlet in a working state, which can be understood as that the exhaust fan 102 extracts the filtered flue gas in the bag-type dust collector 101, and the air outlet of the exhaust fan 102 is communicated with the chimney 103 to blow the filtered flue gas out of the chimney 103, so as to achieve the purpose of discharging.

In the above embodiment, the roasting process of the suspension roasting furnace 2 on the carbide slag and the treatment process of the carbide slag before roasting are explained in detail, the solid phase entering the cooling system from the suspension roasting furnace 2 is the roasted product, and the cooling, impurity removing and collecting processes of the roasted product will be further explained with reference to the structure and the embodiment of the present disclosure.

Referring to fig. 4, in an embodiment of the present disclosure, the cooling system includes at least one stage of cyclone cooler, for example, a three-stage cyclone cooler, including a first cyclone cooler 81, a second cyclone cooler 82, and a third cyclone cooler 83, and the calcined product passes through the first cyclone cooler 81, the second cyclone cooler 82, and the third cyclone cooler 83 in sequence, and is finally reduced to the required temperature.

It should be noted that, at least one stage of cyclone cooler is configured to gradually cool the roasted product and is also configured to introduce the hot air generated in the cooling process into the suspension roasting furnace, so that on one hand, the hot air contributes to increasing the temperature, and on the other hand, an air supplement device is not required to be added to the suspension roasting furnace 2, thereby reducing the occupied space.

In detail, the cyclone cooler is based on the principle of reducing the temperature of the calcined product by sucking external air so that the external air exchanges heat with the calcined product introduced into the cyclone cooler.

In the cooling process, the heat exchange is carried out between the external air and the solid phase in a high-temperature state, the external air exchanges heat with the solid phase after passing through the cyclone cooler, and the heated external air enters the suspension roasting furnace to be used as combustion-supporting air auxiliary fuel for combustion.

In more detail, referring to fig. 4, the discharge port of the first cyclone 3 communicates with the feed port of the first cyclone 81, and the discharge ports of the first cyclone 81, the second cyclone 82, and the third cyclone 83 communicate with the feed port sequentially through a pipe, so that the solid phase from the first cyclone 3 can sequentially pass through the first cyclone 81, the second cyclone 82, and the third cyclone 83, and be cooled to a suitable temperature in the third cyclone 83 for subsequent processing.

Referring to fig. 4, the external air flows reversely pass through the three-stage cooler and finally enter the suspension roasting furnace 2 as combustion air, that is, the air outlets and the air inlets of the third cyclone cooler 83, the second cyclone cooler 82 and the first cyclone cooler 81 are sequentially communicated through the air pipes, and the external air flows sequentially pass through the third cyclone cooler 83, the second cyclone cooler 82 and the first cyclone cooler 81, so as to achieve the purpose of cooling the solid phase.

In detail, referring to fig. 4, the air outlet of the first cyclone cooler 81 is communicated with the first air inlet 212 of the suspension roaster 2 to provide combustion air to the main combustion zone 21 of the suspension roaster 2; the second cyclone cooler 82 comprises two air outlets, one of which is in communication with the air inlet of the first cyclone cooler 81 and the other of which is in communication with the second air inlet 221 of the suspension calciner 2, whereby combustion air is supplied to the burnout zone 22 of the suspension calciner 2 so that the fuel in the suspension calciner 2 is completely combusted.

Therefore, the external airflow reversely and sequentially passes through at least one stage of cyclone cooler to be preheated, and the preheated airflow at least partially passes through the main combustion zone 21 so as to carry out oxygen-deficient roasting on the carbide slag from the raw material bin in the main combustion zone 21; the preheated gas stream is at least partially passed into the burnout zone 22 so that the burnout zone 22 roasts the under-oxygen burned carbide slag. Combustion-supporting air is provided for the suspension roasting furnace 2 through the at least one stage of cyclone cooler, and the combustion-supporting air is preheated in the at least one stage of cyclone cooler, so that the combustion-supporting air can provide part of heat for the suspension roasting furnace 2, and the utilization rate of resources is improved.

In one embodiment of the present disclosure, referring to fig. 5, the present disclosure further includes an impurity removing device 9, wherein the impurity removing device 9 is communicated with the discharge port of the third cyclone cooler 83 and configured to remove impurities from the solid phase cooled by the cyclone cooler 83.

In detail, referring to fig. 5, the impurity removing device 9 is a winnowing machine configured to screen the solid phase by winnowing and blow the screened solid phase into a bag-type dust collector 101, the bag-type dust collector 101 filters and collects the winnowing solid phase, and the collected solid phase is transported to a finished product bin by a transporting device for storage.

In one embodiment of the present disclosure, referring to fig. 5, the conveying device includes a conveying belt 104 and a bucket elevator 105, the conveying belt 104 is located below the bag-type dust collector 101, the solid phase collected by the bag-type dust collector 101 is discharged through a discharge port below, the conveying belt 104 carries the solid phase falling from the bag-type dust collector 101 and conveys the solid phase to the bucket elevator 105; the hopper lift 105 is configured to transfer the solid phase conveyed by the conveyor 104 into a finished goods bin 106 for storage.

Of course, it is obvious to those skilled in the art that the collected solid phase may be transferred to a finished product warehouse for storage in other ways, which is not limited to this.

In one embodiment of the present disclosure, referring to fig. 5, further comprising an exhaust fan 102 in communication with the bag-type dust collector 101, wherein the exhaust fan 102 is configured to send the flue gas in the bag-type dust collector 101 to a chimney 103 for exhaust.

In detail, when the solid phase enters the impurity removing device 9, some smoke may accompany, the bag-type dust collector 101 may filter and collect the solid phase, and may separate and discharge the smoke, and the discharged smoke is discharged into the chimney 103 through the exhaust fan 102 to be discharged.

In an embodiment of the present disclosure, referring to fig. 6, the raw material bin 1, the crushing device 4, the cyclone preheater 6, the suspension roasting furnace 2, the cooling system, and the impurity removal device 9 are sequentially communicated, so that the preparation of a solid phase through carbide slag is realized, and therefore, the carbide slag is sequentially subjected to crushing, preheating, roasting, cooling, and impurity removal, and finally a solid phase product meeting requirements is obtained, and the solid phase product may be activated calcium oxide, overburning calcium oxide, or the like prepared through the carbide slag.

It should be noted that the connection relationship of all the devices in the present embodiment is the same as the connection relationship, the structure and the function of the devices in the above embodiments, and the operation of each device in the present embodiment can be completely inferred from the description in the above embodiments.

According to the system, the calcined finished product is subjected to powder selection and impurity removal, the impurity removal and powder selection load is reduced due to the fact that the material is decomposed, investment and operating cost are saved, and meanwhile, the problem that more qualified materials are removed along with impurities due to the fact that the materials are agglomerated and caked before the impurity removal is conducted is avoided, and the yield of the qualified products is reduced.

The foregoing description of the embodiments of the present disclosure has been presented for purposes of illustration and description, but is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein was chosen in order to best explain the principles of the embodiments, the practical application, or technical improvements to the market, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein. The scope of the present disclosure is defined by the appended claims.

Claims (10)

1. A carbide slag roasting treatment system is characterized by comprising:

a raw material bin;

a suspension roasting furnace configured to roast carbide slag in a raw material bin;

a first cyclone separator configured to communicate with an outlet of the suspension roaster for gas-solid separation;

and the impurity removing device is used for removing impurities from the solid phase separated by the first cyclone separator.

2. The system of claim 1, wherein the de-aeration device is a winnower configured to screen the solid phase by winnowing, the screened product configured to be sent to a product bin for storage.

3. The system for roasting treatment of carbide slag according to claim 2, further comprising a bag-type dust collector, wherein the finished product screened by the air separator is configured to be collected by the bag-type dust collector and then sent to a finished product bin for storage.

4. The system for roasting treatment of carbide slag according to claim 3, further comprising:

a conveyor belt located below the bag-type dust collector and configured to convey a finished product falling from the bag-type dust collector;

and the bucket elevator is matched with the finished products conveyed by the conveying belt and is used for conveying the finished products into the finished product bin for storage.

5. The carbide slag roasting treatment system of claim 3, further comprising an exhaust fan in communication with the bag-type dust remover, the exhaust fan configured to send flue gas of the bag-type dust remover to a chimney for exhaust.

6. The system for roasting and treating carbide slag according to claim 1, further comprising a cooling system, wherein the solid phase separated by the first cyclone separator enters the impurity removing device after being cooled by the cooling system.

7. The system for roasting treatment of carbide slag according to claim 6, wherein the cooling system comprises at least one stage of cyclone cooler, and the solid phase from the first cyclone separator enters into the at least one stage of cyclone cooler in sequence for cooling.

8. The system of claim 7, wherein an air outlet of at least one of the cyclone coolers is communicated with an air inlet of the suspension roaster, an external air flow is preheated after passing through the at least one of the cyclone coolers in reverse order, and the preheated air flow is configured to be fed into the suspension roaster as combustion air.

9. The system for roasting and treating carbide slag according to claim 7, wherein the cyclone cooler comprises a first cyclone cooler, a second cyclone cooler and a third cyclone cooler which are communicated in sequence; and the solid phase is sequentially cooled step by the first cyclone cooler, the second cyclone cooler and the third cyclone cooler.

10. The carbide slag roasting treatment system according to claim 9, wherein air outlets and air inlets of the third cyclone cooler, the second cyclone cooler and the first cyclone cooler are sequentially communicated through air pipes, an air outlet of the first cyclone cooler is communicated with the first air inlet of the suspension roasting furnace, external air flows reversely and sequentially pass through the third cyclone cooler, the second cyclone cooler and the first cyclone cooler and then are preheated by solid phase step by step, and the preheated air flows are configured to be sent into the suspension roasting furnace as combustion air.

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